Kinetics of the decomposition reaction of phosphorite concentrate
Apatite is the raw material, which is mainly used in phosphate fertilizer, and part are used in yellow phosphorus, red phosphorus, and phosphoric acid in the industry. With the decrease of the high grade phosphorite lump, the agglomeration process is necessary for the phosphorite concentrat...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Association of the Chemical Engineers of Serbia
2014-01-01
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| Series: | Chemical Industry and Chemical Engineering Quarterly |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-9372/2014/1451-93721300002H.pdf |
| _version_ | 1811265795561357312 |
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| author | Huang Run Lv Xuewei Pan Cheng Li Donghai Enguangguo |
| author_facet | Huang Run Lv Xuewei Pan Cheng Li Donghai Enguangguo |
| author_sort | Huang Run |
| collection | DOAJ |
| description | Apatite is the raw material, which is mainly used in phosphate fertilizer,
and part are used in yellow phosphorus, red phosphorus, and phosphoric acid
in the industry. With the decrease of the high grade phosphorite lump, the
agglomeration process is necessary for the phosphorite concentrate after
beneficiation process. The decomposition behavior and the phase
transformation are of vital importance for the agglomeration process of
phosphorite. In this study, the thermal kinetic analysis method was used to
study the kinetics of the decomposition of phosphorite concentrate. The
phosphorite concentrate was heated under various heating rate, and the phases
in the sample heated were examined by the X-ray diffraction method. It was
found that the main phases in the phosphorite are fluorapatiteCa5(PO4)3F,
quartz SiO2,and dolomite CaMg(CO3)2.The endothermic DSC peak corresponding to
the mass loss caused by the decomposition of dolomite covers from 600°C to
850°C. The activation energy of the decomposition of dolomite, which
increases with the increase in the extent of conversion, is about
71.6~123.6kJ/mol. The mechanism equation for the decomposition of dolomite
agrees with the Valensi equation and G-B equation. |
| first_indexed | 2024-04-12T20:30:24Z |
| format | Article |
| id | doaj.art-3eb9462b7a694f478a90127271e6cec3 |
| institution | Directory Open Access Journal |
| issn | 1451-9372 2217-7434 |
| language | English |
| last_indexed | 2024-04-12T20:30:24Z |
| publishDate | 2014-01-01 |
| publisher | Association of the Chemical Engineers of Serbia |
| record_format | Article |
| series | Chemical Industry and Chemical Engineering Quarterly |
| spelling | doaj.art-3eb9462b7a694f478a90127271e6cec32022-12-22T03:17:46ZengAssociation of the Chemical Engineers of SerbiaChemical Industry and Chemical Engineering Quarterly1451-93722217-74342014-01-0120221522110.2298/CICEQ121023002H1451-93721300002HKinetics of the decomposition reaction of phosphorite concentrateHuang Run0Lv Xuewei1Pan Cheng2Li Donghai3Enguangguo4College of Materials Science and Engineering, Chongqing University, Chongqing, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, ChinaApatite is the raw material, which is mainly used in phosphate fertilizer, and part are used in yellow phosphorus, red phosphorus, and phosphoric acid in the industry. With the decrease of the high grade phosphorite lump, the agglomeration process is necessary for the phosphorite concentrate after beneficiation process. The decomposition behavior and the phase transformation are of vital importance for the agglomeration process of phosphorite. In this study, the thermal kinetic analysis method was used to study the kinetics of the decomposition of phosphorite concentrate. The phosphorite concentrate was heated under various heating rate, and the phases in the sample heated were examined by the X-ray diffraction method. It was found that the main phases in the phosphorite are fluorapatiteCa5(PO4)3F, quartz SiO2,and dolomite CaMg(CO3)2.The endothermic DSC peak corresponding to the mass loss caused by the decomposition of dolomite covers from 600°C to 850°C. The activation energy of the decomposition of dolomite, which increases with the increase in the extent of conversion, is about 71.6~123.6kJ/mol. The mechanism equation for the decomposition of dolomite agrees with the Valensi equation and G-B equation.http://www.doiserbia.nb.rs/img/doi/1451-9372/2014/1451-93721300002H.pdfphosphoritekineticsactivation energyreaction mechanism |
| spellingShingle | Huang Run Lv Xuewei Pan Cheng Li Donghai Enguangguo Kinetics of the decomposition reaction of phosphorite concentrate Chemical Industry and Chemical Engineering Quarterly phosphorite kinetics activation energy reaction mechanism |
| title | Kinetics of the decomposition reaction of phosphorite concentrate |
| title_full | Kinetics of the decomposition reaction of phosphorite concentrate |
| title_fullStr | Kinetics of the decomposition reaction of phosphorite concentrate |
| title_full_unstemmed | Kinetics of the decomposition reaction of phosphorite concentrate |
| title_short | Kinetics of the decomposition reaction of phosphorite concentrate |
| title_sort | kinetics of the decomposition reaction of phosphorite concentrate |
| topic | phosphorite kinetics activation energy reaction mechanism |
| url | http://www.doiserbia.nb.rs/img/doi/1451-9372/2014/1451-93721300002H.pdf |
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